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US 7,008,992 B1Granted
Water insoluble non-ionic graft copolymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsLoretta Ann Grezzo Page, Kathryn Amy Pearlstine, Waifong L. Anton
Life of this patent
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Abstract
A non-ionic graft copolymer has a hydrophobic backbone and non-ionic, hydrophilic side chains having a molecular weight of at least 500, preferably 100–2000 is substantially insoluble in water, but soluble in an aqueous vehicle, and is particularly suited for use in aqueous coating compositions in which water comprises no more than 80% by weight of the vehicle for the composition.
Claims11
An aqueous coating composition comprising:
- (a) an aqueous vehicle comprising water and at least one organic co-solvent, wherein water comprises no more than 80% by weight of the total weight of the vehicle, and wherein the co-solvent is water-soluble or water-miscible so as to form a single phase vehicle with water;
- (b) a pigment dispersion comprising a pigment and a polymeric dispersant, and
- (c) a film-forming, non-ionic graft copolymer binder comprising a hydrophobic backbone and non-ionic, hydrophilic side chains, sad side chains having a number average molecular weight of at least 500, wherein the graft copolymer is soluble in the vehicle but substantially insoluble in water.
A washfast ink composition for use in printing of textiles comprising:
- (a) an aqueous vehicle comprising water and at least one organic co-solvent, wherein water comprises no more than 80% by weight of the total weight of the vehicle, and wherein the co-solvent is water-soluble or water-miscible so as to form a single phase vehicle with water;
- (b) a pigment dispersion comprising a pigment and a polymeric dispersant, and
- (c) a film-forming, non-ionic graft copolymer binder comprising a hydrophobic backbone and non-ionic, hydrophilic side chains, said side chains having a number average molecular weight of at least 500, wherein the graft copolymer is soluble in the vehicle but substantially insoluble in water.
Dependencies are inferred from the claim text.